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Merge remote-tracking branch 'moduleh/module.h-split'
[linux-2.6/next.git] / drivers / media / rc / redrat3.c
bloba166044779174bd4349572a052af3b16ff3b3c6d
1 /*
2 * USB RedRat3 IR Transceiver rc-core driver
3 *
4 * Copyright (c) 2011 by Jarod Wilson <jarod@redhat.com>
5 * based heavily on the work of Stephen Cox, with additional
6 * help from RedRat Ltd.
7 *
8 * This driver began life based an an old version of the first-generation
9 * lirc_mceusb driver from the lirc 0.7.2 distribution. It was then
10 * significantly rewritten by Stephen Cox with the aid of RedRat Ltd's
11 * Chris Dodge.
12 *
13 * The driver was then ported to rc-core and significantly rewritten again,
14 * by Jarod, using the in-kernel mceusb driver as a guide, after an initial
15 * port effort was started by Stephen.
16 *
17 * TODO LIST:
18 * - fix lirc not showing repeats properly
19 * --
20 *
21 * The RedRat3 is a USB transceiver with both send & receive,
22 * with 2 separate sensors available for receive to enable
23 * both good long range reception for general use, and good
24 * short range reception when required for learning a signal.
25 *
26 * http://www.redrat.co.uk/
27 *
28 * It uses its own little protocol to communicate, the required
29 * parts of which are embedded within this driver.
30 * --
31 *
32 * This program is free software; you can redistribute it and/or modify
33 * it under the terms of the GNU General Public License as published by
34 * the Free Software Foundation; either version 2 of the License, or
35 * (at your option) any later version.
36 *
37 * This program is distributed in the hope that it will be useful,
38 * but WITHOUT ANY WARRANTY; without even the implied warranty of
39 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
40 * GNU General Public License for more details.
41 *
42 * You should have received a copy of the GNU General Public License
43 * along with this program; if not, write to the Free Software
44 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
45 *
46 */
47
48 #include <linux/device.h>
49 #include <linux/module.h>
50 #include <linux/slab.h>
51 #include <linux/usb.h>
52 #include <linux/usb/input.h>
53 #include <media/rc-core.h>
54
55 /* Driver Information */
56 #define DRIVER_VERSION "0.70"
57 #define DRIVER_AUTHOR "Jarod Wilson <jarod@redhat.com>"
58 #define DRIVER_AUTHOR2 "The Dweller, Stephen Cox"
59 #define DRIVER_DESC "RedRat3 USB IR Transceiver Driver"
60 #define DRIVER_NAME "redrat3"
61
62 /* module parameters */
63 #ifdef CONFIG_USB_DEBUG
64 static int debug = 1;
65 #else
66 static int debug;
67 #endif
68
69 #define RR3_DEBUG_STANDARD 0x1
70 #define RR3_DEBUG_FUNCTION_TRACE 0x2
71
72 #define rr3_dbg(dev, fmt, ...) \
73 do { \
74 if (debug & RR3_DEBUG_STANDARD) \
75 dev_info(dev, fmt, ## __VA_ARGS__); \
76 } while (0)
77
78 #define rr3_ftr(dev, fmt, ...) \
79 do { \
80 if (debug & RR3_DEBUG_FUNCTION_TRACE) \
81 dev_info(dev, fmt, ## __VA_ARGS__); \
82 } while (0)
83
84 /* bulk data transfer types */
85 #define RR3_ERROR 0x01
86 #define RR3_MOD_SIGNAL_IN 0x20
87 #define RR3_MOD_SIGNAL_OUT 0x21
88
89 /* Get the RR firmware version */
90 #define RR3_FW_VERSION 0xb1
91 #define RR3_FW_VERSION_LEN 64
92 /* Send encoded signal bulk-sent earlier*/
93 #define RR3_TX_SEND_SIGNAL 0xb3
94 #define RR3_SET_IR_PARAM 0xb7
95 #define RR3_GET_IR_PARAM 0xb8
96 /* Blink the red LED on the device */
97 #define RR3_BLINK_LED 0xb9
98 /* Read serial number of device */
99 #define RR3_READ_SER_NO 0xba
100 #define RR3_SER_NO_LEN 4
101 /* Start capture with the RC receiver */
102 #define RR3_RC_DET_ENABLE 0xbb
103 /* Stop capture with the RC receiver */
104 #define RR3_RC_DET_DISABLE 0xbc
105 /* Return the status of RC detector capture */
106 #define RR3_RC_DET_STATUS 0xbd
107 /* Reset redrat */
108 #define RR3_RESET 0xa0
109
110 /* Max number of lengths in the signal. */
111 #define RR3_IR_IO_MAX_LENGTHS 0x01
112 /* Periods to measure mod. freq. */
113 #define RR3_IR_IO_PERIODS_MF 0x02
114 /* Size of memory for main signal data */
115 #define RR3_IR_IO_SIG_MEM_SIZE 0x03
116 /* Delta value when measuring lengths */
117 #define RR3_IR_IO_LENGTH_FUZZ 0x04
118 /* Timeout for end of signal detection */
119 #define RR3_IR_IO_SIG_TIMEOUT 0x05
120 /* Minumum value for pause recognition. */
121 #define RR3_IR_IO_MIN_PAUSE 0x06
122
123 /* Clock freq. of EZ-USB chip */
124 #define RR3_CLK 24000000
125 /* Clock periods per timer count */
126 #define RR3_CLK_PER_COUNT 12
127 /* (RR3_CLK / RR3_CLK_PER_COUNT) */
128 #define RR3_CLK_CONV_FACTOR 2000000
129 /* USB bulk-in IR data endpoint address */
130 #define RR3_BULK_IN_EP_ADDR 0x82
131
132 /* Raw Modulated signal data value offsets */
133 #define RR3_PAUSE_OFFSET 0
134 #define RR3_FREQ_COUNT_OFFSET 4
135 #define RR3_NUM_PERIOD_OFFSET 6
136 #define RR3_MAX_LENGTHS_OFFSET 8
137 #define RR3_NUM_LENGTHS_OFFSET 9
138 #define RR3_MAX_SIGS_OFFSET 10
139 #define RR3_NUM_SIGS_OFFSET 12
140 #define RR3_REPEATS_OFFSET 14
141
142 /* Size of the fixed-length portion of the signal */
143 #define RR3_HEADER_LENGTH 15
144 #define RR3_DRIVER_MAXLENS 128
145 #define RR3_MAX_SIG_SIZE 512
146 #define RR3_MAX_BUF_SIZE \
147 ((2 * RR3_HEADER_LENGTH) + RR3_DRIVER_MAXLENS + RR3_MAX_SIG_SIZE)
148 #define RR3_TIME_UNIT 50
149 #define RR3_END_OF_SIGNAL 0x7f
150 #define RR3_TX_HEADER_OFFSET 4
151 #define RR3_TX_TRAILER_LEN 2
152 #define RR3_RX_MIN_TIMEOUT 5
153 #define RR3_RX_MAX_TIMEOUT 2000
154
155 /* The 8051's CPUCS Register address */
156 #define RR3_CPUCS_REG_ADDR 0x7f92
157
158 #define USB_RR3USB_VENDOR_ID 0x112a
159 #define USB_RR3USB_PRODUCT_ID 0x0001
160 #define USB_RR3IIUSB_PRODUCT_ID 0x0005
161
162 /* table of devices that work with this driver */
163 static struct usb_device_id redrat3_dev_table[] = {
164 /* Original version of the RedRat3 */
165 {USB_DEVICE(USB_RR3USB_VENDOR_ID, USB_RR3USB_PRODUCT_ID)},
166 /* Second Version/release of the RedRat3 - RetRat3-II */
167 {USB_DEVICE(USB_RR3USB_VENDOR_ID, USB_RR3IIUSB_PRODUCT_ID)},
168 {} /* Terminating entry */
169 };
170
171 /* Structure to hold all of our device specific stuff */
172 struct redrat3_dev {
173 /* core device bits */
174 struct rc_dev *rc;
175 struct device *dev;
176
177 /* save off the usb device pointer */
178 struct usb_device *udev;
179
180 /* the receive endpoint */
181 struct usb_endpoint_descriptor *ep_in;
182 /* the buffer to receive data */
183 unsigned char *bulk_in_buf;
184 /* urb used to read ir data */
185 struct urb *read_urb;
186
187 /* the send endpoint */
188 struct usb_endpoint_descriptor *ep_out;
189 /* the buffer to send data */
190 unsigned char *bulk_out_buf;
191 /* the urb used to send data */
192 struct urb *write_urb;
193
194 /* usb dma */
195 dma_addr_t dma_in;
196 dma_addr_t dma_out;
197
198 /* true if write urb is busy */
199 bool write_busy;
200 /* wait for the write to finish */
201 struct completion write_finished;
202
203 /* locks this structure */
204 struct mutex lock;
205
206 /* rx signal timeout timer */
207 struct timer_list rx_timeout;
208 u32 hw_timeout;
209
210 /* Is the device currently receiving? */
211 bool recv_in_progress;
212 /* is the detector enabled*/
213 bool det_enabled;
214 /* Is the device currently transmitting?*/
215 bool transmitting;
216
217 /* store for current packet */
218 char pbuf[RR3_MAX_BUF_SIZE];
219 u16 pktlen;
220 u16 pkttype;
221 u16 bytes_read;
222 /* indicate whether we are going to reprocess
223 * the USB callback with a bigger buffer */
224 int buftoosmall;
225 char *datap;
226
227 u32 carrier;
228
229 char name[128];
230 char phys[64];
231 };
232
233 /* All incoming data buffers adhere to a very specific data format */
234 struct redrat3_signal_header {
235 u16 length; /* Length of data being transferred */
236 u16 transfer_type; /* Type of data transferred */
237 u32 pause; /* Pause between main and repeat signals */
238 u16 mod_freq_count; /* Value of timer on mod. freq. measurement */
239 u16 no_periods; /* No. of periods over which mod. freq. is measured */
240 u8 max_lengths; /* Max no. of lengths (i.e. size of array) */
241 u8 no_lengths; /* Actual no. of elements in lengths array */
242 u16 max_sig_size; /* Max no. of values in signal data array */
243 u16 sig_size; /* Acuto no. of values in signal data array */
244 u8 no_repeats; /* No. of repeats of repeat signal section */
245 /* Here forward is the lengths and signal data */
246 };
247
248 static void redrat3_dump_signal_header(struct redrat3_signal_header *header)
249 {
250 pr_info("%s:\n", __func__);
251 pr_info(" * length: %u, transfer_type: 0x%02x\n",
252 header->length, header->transfer_type);
253 pr_info(" * pause: %u, freq_count: %u, no_periods: %u\n",
254 header->pause, header->mod_freq_count, header->no_periods);
255 pr_info(" * lengths: %u (max: %u)\n",
256 header->no_lengths, header->max_lengths);
257 pr_info(" * sig_size: %u (max: %u)\n",
258 header->sig_size, header->max_sig_size);
259 pr_info(" * repeats: %u\n", header->no_repeats);
260 }
261
262 static void redrat3_dump_signal_data(char *buffer, u16 len)
263 {
264 int offset, i;
265 char *data_vals;
266
267 pr_info("%s:", __func__);
268
269 offset = RR3_TX_HEADER_OFFSET + RR3_HEADER_LENGTH
270 + (RR3_DRIVER_MAXLENS * sizeof(u16));
271
272 /* read RR3_DRIVER_MAXLENS from ctrl msg */
273 data_vals = buffer + offset;
274
275 for (i = 0; i < len; i++) {
276 if (i % 10 == 0)
277 pr_cont("\n * ");
278 pr_cont("%02x ", *data_vals++);
279 }
280
281 pr_cont("\n");
282 }
283
284 /*
285 * redrat3_issue_async
286 *
287 * Issues an async read to the ir data in port..
288 * sets the callback to be redrat3_handle_async
289 */
290 static void redrat3_issue_async(struct redrat3_dev *rr3)
291 {
292 int res;
293
294 rr3_ftr(rr3->dev, "Entering %s\n", __func__);
295
296 if (!rr3->det_enabled) {
297 dev_warn(rr3->dev, "not issuing async read, "
298 "detector not enabled\n");
299 return;
300 }
301
302 memset(rr3->bulk_in_buf, 0, rr3->ep_in->wMaxPacketSize);
303 res = usb_submit_urb(rr3->read_urb, GFP_ATOMIC);
304 if (res)
305 rr3_dbg(rr3->dev, "%s: receive request FAILED! "
306 "(res %d, len %d)\n", __func__, res,
307 rr3->read_urb->transfer_buffer_length);
308 }
309
310 static void redrat3_dump_fw_error(struct redrat3_dev *rr3, int code)
311 {
312 if (!rr3->transmitting && (code != 0x40))
313 dev_info(rr3->dev, "fw error code 0x%02x: ", code);
314
315 switch (code) {
316 case 0x00:
317 pr_cont("No Error\n");
318 break;
319
320 /* Codes 0x20 through 0x2f are IR Firmware Errors */
321 case 0x20:
322 pr_cont("Initial signal pulse not long enough "
323 "to measure carrier frequency\n");
324 break;
325 case 0x21:
326 pr_cont("Not enough length values allocated for signal\n");
327 break;
328 case 0x22:
329 pr_cont("Not enough memory allocated for signal data\n");
330 break;
331 case 0x23:
332 pr_cont("Too many signal repeats\n");
333 break;
334 case 0x28:
335 pr_cont("Insufficient memory available for IR signal "
336 "data memory allocation\n");
337 break;
338 case 0x29:
339 pr_cont("Insufficient memory available "
340 "for IrDa signal data memory allocation\n");
341 break;
342
343 /* Codes 0x30 through 0x3f are USB Firmware Errors */
344 case 0x30:
345 pr_cont("Insufficient memory available for bulk "
346 "transfer structure\n");
347 break;
348
349 /*
350 * Other error codes... These are primarily errors that can occur in
351 * the control messages sent to the redrat
352 */
353 case 0x40:
354 if (!rr3->transmitting)
355 pr_cont("Signal capture has been terminated\n");
356 break;
357 case 0x41:
358 pr_cont("Attempt to set/get and unknown signal I/O "
359 "algorithm parameter\n");
360 break;
361 case 0x42:
362 pr_cont("Signal capture already started\n");
363 break;
364
365 default:
366 pr_cont("Unknown Error\n");
367 break;
368 }
369 }
370
371 static u32 redrat3_val_to_mod_freq(struct redrat3_signal_header *ph)
372 {
373 u32 mod_freq = 0;
374
375 if (ph->mod_freq_count != 0)
376 mod_freq = (RR3_CLK * ph->no_periods) /
377 (ph->mod_freq_count * RR3_CLK_PER_COUNT);
378
379 return mod_freq;
380 }
381
382 /* this function scales down the figures for the same result... */
383 static u32 redrat3_len_to_us(u32 length)
384 {
385 u32 biglen = length * 1000;
386 u32 divisor = (RR3_CLK_CONV_FACTOR) / 1000;
387 u32 result = (u32) (biglen / divisor);
388
389 /* don't allow zero lengths to go back, breaks lirc */
390 return result ? result : 1;
391 }
392
393 /*
394 * convert us back into redrat3 lengths
395 *
396 * length * 1000 length * 1000000
397 * ------------- = ---------------- = micro
398 * rr3clk / 1000 rr3clk
399
400 * 6 * 2 4 * 3 micro * rr3clk micro * rr3clk / 1000
401 * ----- = 4 ----- = 6 -------------- = len ---------------------
402 * 3 2 1000000 1000
403 */
404 static u32 redrat3_us_to_len(u32 microsec)
405 {
406 u32 result;
407 u32 divisor;
408
409 microsec &= IR_MAX_DURATION;
410 divisor = (RR3_CLK_CONV_FACTOR / 1000);
411 result = (u32)(microsec * divisor) / 1000;
412
413 /* don't allow zero lengths to go back, breaks lirc */
414 return result ? result : 1;
415
416 }
417
418 /* timer callback to send reset event */
419 static void redrat3_rx_timeout(unsigned long data)
420 {
421 struct redrat3_dev *rr3 = (struct redrat3_dev *)data;
422
423 rr3_dbg(rr3->dev, "calling ir_raw_event_reset\n");
424 ir_raw_event_reset(rr3->rc);
425 }
426
427 static void redrat3_process_ir_data(struct redrat3_dev *rr3)
428 {
429 DEFINE_IR_RAW_EVENT(rawir);
430 struct redrat3_signal_header header;
431 struct device *dev;
432 int i, trailer = 0;
433 unsigned long delay;
434 u32 mod_freq, single_len;
435 u16 *len_vals;
436 u8 *data_vals;
437 u32 tmp32;
438 u16 tmp16;
439 char *sig_data;
440
441 if (!rr3) {
442 pr_err("%s called with no context!\n", __func__);
443 return;
444 }
445
446 rr3_ftr(rr3->dev, "Entered %s\n", __func__);
447
448 dev = rr3->dev;
449 sig_data = rr3->pbuf;
450
451 header.length = rr3->pktlen;
452 header.transfer_type = rr3->pkttype;
453
454 /* Sanity check */
455 if (!(header.length >= RR3_HEADER_LENGTH))
456 dev_warn(dev, "read returned less than rr3 header len\n");
457
458 /* Make sure we reset the IR kfifo after a bit of inactivity */
459 delay = usecs_to_jiffies(rr3->hw_timeout);
460 mod_timer(&rr3->rx_timeout, jiffies + delay);
461
462 memcpy(&tmp32, sig_data + RR3_PAUSE_OFFSET, sizeof(tmp32));
463 header.pause = be32_to_cpu(tmp32);
464
465 memcpy(&tmp16, sig_data + RR3_FREQ_COUNT_OFFSET, sizeof(tmp16));
466 header.mod_freq_count = be16_to_cpu(tmp16);
467
468 memcpy(&tmp16, sig_data + RR3_NUM_PERIOD_OFFSET, sizeof(tmp16));
469 header.no_periods = be16_to_cpu(tmp16);
470
471 header.max_lengths = sig_data[RR3_MAX_LENGTHS_OFFSET];
472 header.no_lengths = sig_data[RR3_NUM_LENGTHS_OFFSET];
473
474 memcpy(&tmp16, sig_data + RR3_MAX_SIGS_OFFSET, sizeof(tmp16));
475 header.max_sig_size = be16_to_cpu(tmp16);
476
477 memcpy(&tmp16, sig_data + RR3_NUM_SIGS_OFFSET, sizeof(tmp16));
478 header.sig_size = be16_to_cpu(tmp16);
479
480 header.no_repeats= sig_data[RR3_REPEATS_OFFSET];
481
482 if (debug) {
483 redrat3_dump_signal_header(&header);
484 redrat3_dump_signal_data(sig_data, header.sig_size);
485 }
486
487 mod_freq = redrat3_val_to_mod_freq(&header);
488 rr3_dbg(dev, "Got mod_freq of %u\n", mod_freq);
489
490 /* Here we pull out the 'length' values from the signal */
491 len_vals = (u16 *)(sig_data + RR3_HEADER_LENGTH);
492
493 data_vals = sig_data + RR3_HEADER_LENGTH +
494 (header.max_lengths * sizeof(u16));
495
496 /* process each rr3 encoded byte into an int */
497 for (i = 0; i < header.sig_size; i++) {
498 u16 val = len_vals[data_vals[i]];
499 single_len = redrat3_len_to_us((u32)be16_to_cpu(val));
500
501 /* we should always get pulse/space/pulse/space samples */
502 if (i % 2)
503 rawir.pulse = false;
504 else
505 rawir.pulse = true;
506
507 rawir.duration = US_TO_NS(single_len);
508 /* Save initial pulse length to fudge trailer */
509 if (i == 0)
510 trailer = rawir.duration;
511 /* cap the value to IR_MAX_DURATION */
512 rawir.duration &= IR_MAX_DURATION;
513
514 rr3_dbg(dev, "storing %s with duration %d (i: %d)\n",
515 rawir.pulse ? "pulse" : "space", rawir.duration, i);
516 ir_raw_event_store_with_filter(rr3->rc, &rawir);
517 }
518
519 /* add a trailing space, if need be */
520 if (i % 2) {
521 rawir.pulse = false;
522 /* this duration is made up, and may not be ideal... */
523 if (trailer < US_TO_NS(1000))
524 rawir.duration = US_TO_NS(2800);
525 else
526 rawir.duration = trailer;
527 rr3_dbg(dev, "storing trailing space with duration %d\n",
528 rawir.duration);
529 ir_raw_event_store_with_filter(rr3->rc, &rawir);
530 }
531
532 rr3_dbg(dev, "calling ir_raw_event_handle\n");
533 ir_raw_event_handle(rr3->rc);
534
535 return;
536 }
537
538 /* Util fn to send rr3 cmds */
539 static u8 redrat3_send_cmd(int cmd, struct redrat3_dev *rr3)
540 {
541 struct usb_device *udev;
542 u8 *data;
543 int res;
544
545 data = kzalloc(sizeof(u8), GFP_KERNEL);
546 if (!data)
547 return -ENOMEM;
548
549 udev = rr3->udev;
550 res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), cmd,
551 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
552 0x0000, 0x0000, data, sizeof(u8), HZ * 10);
553
554 if (res < 0) {
555 dev_err(rr3->dev, "%s: Error sending rr3 cmd res %d, data %d",
556 __func__, res, *data);
557 res = -EIO;
558 } else
559 res = (u8)data[0];
560
561 kfree(data);
562
563 return res;
564 }
565
566 /* Enables the long range detector and starts async receive */
567 static int redrat3_enable_detector(struct redrat3_dev *rr3)
568 {
569 struct device *dev = rr3->dev;
570 u8 ret;
571
572 rr3_ftr(dev, "Entering %s\n", __func__);
573
574 ret = redrat3_send_cmd(RR3_RC_DET_ENABLE, rr3);
575 if (ret != 0)
576 dev_dbg(dev, "%s: unexpected ret of %d\n",
577 __func__, ret);
578
579 ret = redrat3_send_cmd(RR3_RC_DET_STATUS, rr3);
580 if (ret != 1) {
581 dev_err(dev, "%s: detector status: %d, should be 1\n",
582 __func__, ret);
583 return -EIO;
584 }
585
586 rr3->det_enabled = true;
587 redrat3_issue_async(rr3);
588
589 return 0;
590 }
591
592 /* Disables the rr3 long range detector */
593 static void redrat3_disable_detector(struct redrat3_dev *rr3)
594 {
595 struct device *dev = rr3->dev;
596 u8 ret;
597
598 rr3_ftr(dev, "Entering %s\n", __func__);
599
600 ret = redrat3_send_cmd(RR3_RC_DET_DISABLE, rr3);
601 if (ret != 0)
602 dev_err(dev, "%s: failure!\n", __func__);
603
604 ret = redrat3_send_cmd(RR3_RC_DET_STATUS, rr3);
605 if (ret != 0)
606 dev_warn(dev, "%s: detector status: %d, should be 0\n",
607 __func__, ret);
608
609 rr3->det_enabled = false;
610 }
611
612 static inline void redrat3_delete(struct redrat3_dev *rr3,
613 struct usb_device *udev)
614 {
615 rr3_ftr(rr3->dev, "%s cleaning up\n", __func__);
616 usb_kill_urb(rr3->read_urb);
617 usb_kill_urb(rr3->write_urb);
618
619 usb_free_urb(rr3->read_urb);
620 usb_free_urb(rr3->write_urb);
621
622 usb_free_coherent(udev, rr3->ep_in->wMaxPacketSize,
623 rr3->bulk_in_buf, rr3->dma_in);
624 usb_free_coherent(udev, rr3->ep_out->wMaxPacketSize,
625 rr3->bulk_out_buf, rr3->dma_out);
626
627 kfree(rr3);
628 }
629
630 static u32 redrat3_get_timeout(struct redrat3_dev *rr3)
631 {
632 u32 *tmp;
633 u32 timeout = MS_TO_US(150); /* a sane default, if things go haywire */
634 int len, ret, pipe;
635
636 len = sizeof(*tmp);
637 tmp = kzalloc(len, GFP_KERNEL);
638 if (!tmp) {
639 dev_warn(rr3->dev, "Memory allocation faillure\n");
640 return timeout;
641 }
642
643 pipe = usb_rcvctrlpipe(rr3->udev, 0);
644 ret = usb_control_msg(rr3->udev, pipe, RR3_GET_IR_PARAM,
645 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
646 RR3_IR_IO_SIG_TIMEOUT, 0, tmp, len, HZ * 5);
647 if (ret != len) {
648 dev_warn(rr3->dev, "Failed to read timeout from hardware\n");
649 return timeout;
650 }
651
652 timeout = redrat3_len_to_us(be32_to_cpu(*tmp));
653
654 rr3_dbg(rr3->dev, "Got timeout of %d ms\n", timeout / 1000);
655 return timeout;
656 }
657
658 static void redrat3_reset(struct redrat3_dev *rr3)
659 {
660 struct usb_device *udev = rr3->udev;
661 struct device *dev = rr3->dev;
662 int rc, rxpipe, txpipe;
663 u8 *val;
664 int len = sizeof(u8);
665
666 rr3_ftr(dev, "Entering %s\n", __func__);
667
668 rxpipe = usb_rcvctrlpipe(udev, 0);
669 txpipe = usb_sndctrlpipe(udev, 0);
670
671 val = kzalloc(len, GFP_KERNEL);
672 if (!val) {
673 dev_err(dev, "Memory allocation failure\n");
674 return;
675 }
676
677 *val = 0x01;
678 rc = usb_control_msg(udev, rxpipe, RR3_RESET,
679 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
680 RR3_CPUCS_REG_ADDR, 0, val, len, HZ * 25);
681 rr3_dbg(dev, "reset returned 0x%02x\n", rc);
682
683 *val = 5;
684 rc = usb_control_msg(udev, txpipe, RR3_SET_IR_PARAM,
685 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
686 RR3_IR_IO_LENGTH_FUZZ, 0, val, len, HZ * 25);
687 rr3_dbg(dev, "set ir parm len fuzz %d rc 0x%02x\n", *val, rc);
688
689 *val = RR3_DRIVER_MAXLENS;
690 rc = usb_control_msg(udev, txpipe, RR3_SET_IR_PARAM,
691 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT,
692 RR3_IR_IO_MAX_LENGTHS, 0, val, len, HZ * 25);
693 rr3_dbg(dev, "set ir parm max lens %d rc 0x%02x\n", *val, rc);
694
695 kfree(val);
696 }
697
698 static void redrat3_get_firmware_rev(struct redrat3_dev *rr3)
699 {
700 int rc = 0;
701 char *buffer;
702
703 rr3_ftr(rr3->dev, "Entering %s\n", __func__);
704
705 buffer = kzalloc(sizeof(char) * (RR3_FW_VERSION_LEN + 1), GFP_KERNEL);
706 if (!buffer) {
707 dev_err(rr3->dev, "Memory allocation failure\n");
708 return;
709 }
710
711 rc = usb_control_msg(rr3->udev, usb_rcvctrlpipe(rr3->udev, 0),
712 RR3_FW_VERSION,
713 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
714 0, 0, buffer, RR3_FW_VERSION_LEN, HZ * 5);
715
716 if (rc >= 0)
717 dev_info(rr3->dev, "Firmware rev: %s", buffer);
718 else
719 dev_err(rr3->dev, "Problem fetching firmware ID\n");
720
721 kfree(buffer);
722 rr3_ftr(rr3->dev, "Exiting %s\n", __func__);
723 }
724
725 static void redrat3_read_packet_start(struct redrat3_dev *rr3, int len)
726 {
727 u16 tx_error;
728 u16 hdrlen;
729
730 rr3_ftr(rr3->dev, "Entering %s\n", __func__);
731
732 /* grab the Length and type of transfer */
733 memcpy(&(rr3->pktlen), (unsigned char *) rr3->bulk_in_buf,
734 sizeof(rr3->pktlen));
735 memcpy(&(rr3->pkttype), ((unsigned char *) rr3->bulk_in_buf +
736 sizeof(rr3->pktlen)),
737 sizeof(rr3->pkttype));
738
739 /*data needs conversion to know what its real values are*/
740 rr3->pktlen = be16_to_cpu(rr3->pktlen);
741 rr3->pkttype = be16_to_cpu(rr3->pkttype);
742
743 switch (rr3->pkttype) {
744 case RR3_ERROR:
745 memcpy(&tx_error, ((unsigned char *)rr3->bulk_in_buf
746 + (sizeof(rr3->pktlen) + sizeof(rr3->pkttype))),
747 sizeof(tx_error));
748 tx_error = be16_to_cpu(tx_error);
749 redrat3_dump_fw_error(rr3, tx_error);
750 break;
751
752 case RR3_MOD_SIGNAL_IN:
753 hdrlen = sizeof(rr3->pktlen) + sizeof(rr3->pkttype);
754 rr3->bytes_read = len;
755 rr3->bytes_read -= hdrlen;
756 rr3->datap = &(rr3->pbuf[0]);
757
758 memcpy(rr3->datap, ((unsigned char *)rr3->bulk_in_buf + hdrlen),
759 rr3->bytes_read);
760 rr3->datap += rr3->bytes_read;
761 rr3_dbg(rr3->dev, "bytes_read %d, pktlen %d\n",
762 rr3->bytes_read, rr3->pktlen);
763 break;
764
765 default:
766 rr3_dbg(rr3->dev, "ignoring packet with type 0x%02x, "
767 "len of %d, 0x%02x\n", rr3->pkttype, len, rr3->pktlen);
768 break;
769 }
770 }
771
772 static void redrat3_read_packet_continue(struct redrat3_dev *rr3, int len)
773 {
774
775 rr3_ftr(rr3->dev, "Entering %s\n", __func__);
776
777 memcpy(rr3->datap, (unsigned char *)rr3->bulk_in_buf, len);
778 rr3->datap += len;
779
780 rr3->bytes_read += len;
781 rr3_dbg(rr3->dev, "bytes_read %d, pktlen %d\n",
782 rr3->bytes_read, rr3->pktlen);
783 }
784
785 /* gather IR data from incoming urb, process it when we have enough */
786 static int redrat3_get_ir_data(struct redrat3_dev *rr3, int len)
787 {
788 struct device *dev = rr3->dev;
789 int ret = 0;
790
791 rr3_ftr(dev, "Entering %s\n", __func__);
792
793 if (rr3->pktlen > RR3_MAX_BUF_SIZE) {
794 dev_err(rr3->dev, "error: packet larger than buffer\n");
795 ret = -EINVAL;
796 goto out;
797 }
798
799 if ((rr3->bytes_read == 0) &&
800 (len >= (sizeof(rr3->pkttype) + sizeof(rr3->pktlen)))) {
801 redrat3_read_packet_start(rr3, len);
802 } else if (rr3->bytes_read != 0) {
803 redrat3_read_packet_continue(rr3, len);
804 } else if (rr3->bytes_read == 0) {
805 dev_err(dev, "error: no packet data read\n");
806 ret = -ENODATA;
807 goto out;
808 }
809
810 if (rr3->bytes_read > rr3->pktlen) {
811 dev_err(dev, "bytes_read (%d) greater than pktlen (%d)\n",
812 rr3->bytes_read, rr3->pktlen);
813 ret = -EINVAL;
814 goto out;
815 } else if (rr3->bytes_read < rr3->pktlen)
816 /* we're still accumulating data */
817 return 0;
818
819 /* if we get here, we've got IR data to decode */
820 if (rr3->pkttype == RR3_MOD_SIGNAL_IN)
821 redrat3_process_ir_data(rr3);
822 else
823 rr3_dbg(dev, "discarding non-signal data packet "
824 "(type 0x%02x)\n", rr3->pkttype);
825
826 out:
827 rr3->bytes_read = 0;
828 rr3->pktlen = 0;
829 rr3->pkttype = 0;
830 return ret;
831 }
832
833 /* callback function from USB when async USB request has completed */
834 static void redrat3_handle_async(struct urb *urb, struct pt_regs *regs)
835 {
836 struct redrat3_dev *rr3;
837
838 if (!urb)
839 return;
840
841 rr3 = urb->context;
842 if (!rr3) {
843 pr_err("%s called with invalid context!\n", __func__);
844 usb_unlink_urb(urb);
845 return;
846 }
847
848 rr3_ftr(rr3->dev, "Entering %s\n", __func__);
849
850 if (!rr3->det_enabled) {
851 rr3_dbg(rr3->dev, "received a read callback but detector "
852 "disabled - ignoring\n");
853 return;
854 }
855
856 switch (urb->status) {
857 case 0:
858 redrat3_get_ir_data(rr3, urb->actual_length);
859 break;
860
861 case -ECONNRESET:
862 case -ENOENT:
863 case -ESHUTDOWN:
864 usb_unlink_urb(urb);
865 return;
866
867 case -EPIPE:
868 default:
869 dev_warn(rr3->dev, "Error: urb status = %d\n", urb->status);
870 rr3->bytes_read = 0;
871 rr3->pktlen = 0;
872 rr3->pkttype = 0;
873 break;
874 }
875
876 if (!rr3->transmitting)
877 redrat3_issue_async(rr3);
878 else
879 rr3_dbg(rr3->dev, "IR transmit in progress\n");
880 }
881
882 static void redrat3_write_bulk_callback(struct urb *urb, struct pt_regs *regs)
883 {
884 struct redrat3_dev *rr3;
885 int len;
886
887 if (!urb)
888 return;
889
890 rr3 = urb->context;
891 if (rr3) {
892 len = urb->actual_length;
893 rr3_ftr(rr3->dev, "%s: called (status=%d len=%d)\n",
894 __func__, urb->status, len);
895 }
896 }
897
898 static u16 mod_freq_to_val(unsigned int mod_freq)
899 {
900 int mult = 6000000;
901
902 /* Clk used in mod. freq. generation is CLK24/4. */
903 return (u16)(65536 - (mult / mod_freq));
904 }
905
906 static int redrat3_set_tx_carrier(struct rc_dev *dev, u32 carrier)
907 {
908 struct redrat3_dev *rr3 = dev->priv;
909
910 rr3->carrier = carrier;
911
912 return carrier;
913 }
914
915 static int redrat3_transmit_ir(struct rc_dev *rcdev, int *txbuf, u32 n)
916 {
917 struct redrat3_dev *rr3 = rcdev->priv;
918 struct device *dev = rr3->dev;
919 struct redrat3_signal_header header;
920 int i, j, count, ret, ret_len, offset;
921 int lencheck, cur_sample_len, pipe;
922 char *buffer = NULL, *sigdata = NULL;
923 int *sample_lens = NULL;
924 u32 tmpi;
925 u16 tmps;
926 u8 *datap;
927 u8 curlencheck = 0;
928 u16 *lengths_ptr;
929 int sendbuf_len;
930
931 rr3_ftr(dev, "Entering %s\n", __func__);
932
933 if (rr3->transmitting) {
934 dev_warn(dev, "%s: transmitter already in use\n", __func__);
935 return -EAGAIN;
936 }
937
938 count = n / sizeof(int);
939 if (count > (RR3_DRIVER_MAXLENS * 2))
940 return -EINVAL;
941
942 rr3->transmitting = true;
943
944 redrat3_disable_detector(rr3);
945
946 if (rr3->det_enabled) {
947 dev_err(dev, "%s: cannot tx while rx is enabled\n", __func__);
948 ret = -EIO;
949 goto out;
950 }
951
952 sample_lens = kzalloc(sizeof(int) * RR3_DRIVER_MAXLENS, GFP_KERNEL);
953 if (!sample_lens) {
954 ret = -ENOMEM;
955 goto out;
956 }
957
958 for (i = 0; i < count; i++) {
959 for (lencheck = 0; lencheck < curlencheck; lencheck++) {
960 cur_sample_len = redrat3_us_to_len(txbuf[i]);
961 if (sample_lens[lencheck] == cur_sample_len)
962 break;
963 }
964 if (lencheck == curlencheck) {
965 cur_sample_len = redrat3_us_to_len(txbuf[i]);
966 rr3_dbg(dev, "txbuf[%d]=%u, pos %d, enc %u\n",
967 i, txbuf[i], curlencheck, cur_sample_len);
968 if (curlencheck < 255) {
969 /* now convert the value to a proper
970 * rr3 value.. */
971 sample_lens[curlencheck] = cur_sample_len;
972 curlencheck++;
973 } else {
974 dev_err(dev, "signal too long\n");
975 ret = -EINVAL;
976 goto out;
977 }
978 }
979 }
980
981 sigdata = kzalloc((count + RR3_TX_TRAILER_LEN), GFP_KERNEL);
982 if (!sigdata) {
983 ret = -ENOMEM;
984 goto out;
985 }
986
987 sigdata[count] = RR3_END_OF_SIGNAL;
988 sigdata[count + 1] = RR3_END_OF_SIGNAL;
989 for (i = 0; i < count; i++) {
990 for (j = 0; j < curlencheck; j++) {
991 if (sample_lens[j] == redrat3_us_to_len(txbuf[i]))
992 sigdata[i] = j;
993 }
994 }
995
996 offset = RR3_TX_HEADER_OFFSET;
997 sendbuf_len = RR3_HEADER_LENGTH + (sizeof(u16) * RR3_DRIVER_MAXLENS)
998 + count + RR3_TX_TRAILER_LEN + offset;
999
1000 buffer = kzalloc(sendbuf_len, GFP_KERNEL);
1001 if (!buffer) {
1002 ret = -ENOMEM;
1003 goto out;
1004 }
1005
1006 /* fill in our packet header */
1007 header.length = sendbuf_len - offset;
1008 header.transfer_type = RR3_MOD_SIGNAL_OUT;
1009 header.pause = redrat3_len_to_us(100);
1010 header.mod_freq_count = mod_freq_to_val(rr3->carrier);
1011 header.no_periods = 0; /* n/a to transmit */
1012 header.max_lengths = RR3_DRIVER_MAXLENS;
1013 header.no_lengths = curlencheck;
1014 header.max_sig_size = RR3_MAX_SIG_SIZE;
1015 header.sig_size = count + RR3_TX_TRAILER_LEN;
1016 /* we currently rely on repeat handling in the IR encoding source */
1017 header.no_repeats = 0;
1018
1019 tmps = cpu_to_be16(header.length);
1020 memcpy(buffer, &tmps, 2);
1021
1022 tmps = cpu_to_be16(header.transfer_type);
1023 memcpy(buffer + 2, &tmps, 2);
1024
1025 tmpi = cpu_to_be32(header.pause);
1026 memcpy(buffer + offset, &tmpi, sizeof(tmpi));
1027
1028 tmps = cpu_to_be16(header.mod_freq_count);
1029 memcpy(buffer + offset + RR3_FREQ_COUNT_OFFSET, &tmps, 2);
1030
1031 buffer[offset + RR3_NUM_LENGTHS_OFFSET] = header.no_lengths;
1032
1033 tmps = cpu_to_be16(header.sig_size);
1034 memcpy(buffer + offset + RR3_NUM_SIGS_OFFSET, &tmps, 2);
1035
1036 buffer[offset + RR3_REPEATS_OFFSET] = header.no_repeats;
1037
1038 lengths_ptr = (u16 *)(buffer + offset + RR3_HEADER_LENGTH);
1039 for (i = 0; i < curlencheck; ++i)
1040 lengths_ptr[i] = cpu_to_be16(sample_lens[i]);
1041
1042 datap = (u8 *)(buffer + offset + RR3_HEADER_LENGTH +
1043 (sizeof(u16) * RR3_DRIVER_MAXLENS));
1044 memcpy(datap, sigdata, (count + RR3_TX_TRAILER_LEN));
1045
1046 if (debug) {
1047 redrat3_dump_signal_header(&header);
1048 redrat3_dump_signal_data(buffer, header.sig_size);
1049 }
1050
1051 pipe = usb_sndbulkpipe(rr3->udev, rr3->ep_out->bEndpointAddress);
1052 tmps = usb_bulk_msg(rr3->udev, pipe, buffer,
1053 sendbuf_len, &ret_len, 10 * HZ);
1054 rr3_dbg(dev, "sent %d bytes, (ret %d)\n", ret_len, tmps);
1055
1056 /* now tell the hardware to transmit what we sent it */
1057 pipe = usb_rcvctrlpipe(rr3->udev, 0);
1058 ret = usb_control_msg(rr3->udev, pipe, RR3_TX_SEND_SIGNAL,
1059 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
1060 0, 0, buffer, 2, HZ * 10);
1061
1062 if (ret < 0)
1063 dev_err(dev, "Error: control msg send failed, rc %d\n", ret);
1064 else
1065 ret = n;
1066
1067 out:
1068 kfree(sample_lens);
1069 kfree(buffer);
1070 kfree(sigdata);
1071
1072 rr3->transmitting = false;
1073
1074 redrat3_enable_detector(rr3);
1075
1076 return ret;
1077 }
1078
1079 static struct rc_dev *redrat3_init_rc_dev(struct redrat3_dev *rr3)
1080 {
1081 struct device *dev = rr3->dev;
1082 struct rc_dev *rc;
1083 int ret = -ENODEV;
1084 u16 prod = le16_to_cpu(rr3->udev->descriptor.idProduct);
1085
1086 rc = rc_allocate_device();
1087 if (!rc) {
1088 dev_err(dev, "remote input dev allocation failed\n");
1089 goto out;
1090 }
1091
1092 snprintf(rr3->name, sizeof(rr3->name), "RedRat3%s "
1093 "Infrared Remote Transceiver (%04x:%04x)",
1094 prod == USB_RR3IIUSB_PRODUCT_ID ? "-II" : "",
1095 le16_to_cpu(rr3->udev->descriptor.idVendor), prod);
1096
1097 usb_make_path(rr3->udev, rr3->phys, sizeof(rr3->phys));
1098
1099 rc->input_name = rr3->name;
1100 rc->input_phys = rr3->phys;
1101 usb_to_input_id(rr3->udev, &rc->input_id);
1102 rc->dev.parent = dev;
1103 rc->priv = rr3;
1104 rc->driver_type = RC_DRIVER_IR_RAW;
1105 rc->allowed_protos = RC_TYPE_ALL;
1106 rc->timeout = US_TO_NS(2750);
1107 rc->tx_ir = redrat3_transmit_ir;
1108 rc->s_tx_carrier = redrat3_set_tx_carrier;
1109 rc->driver_name = DRIVER_NAME;
1110 rc->map_name = RC_MAP_HAUPPAUGE;
1111
1112 ret = rc_register_device(rc);
1113 if (ret < 0) {
1114 dev_err(dev, "remote dev registration failed\n");
1115 goto out;
1116 }
1117
1118 return rc;
1119
1120 out:
1121 rc_free_device(rc);
1122 return NULL;
1123 }
1124
1125 static int __devinit redrat3_dev_probe(struct usb_interface *intf,
1126 const struct usb_device_id *id)
1127 {
1128 struct usb_device *udev = interface_to_usbdev(intf);
1129 struct device *dev = &intf->dev;
1130 struct usb_host_interface *uhi;
1131 struct redrat3_dev *rr3;
1132 struct usb_endpoint_descriptor *ep;
1133 struct usb_endpoint_descriptor *ep_in = NULL;
1134 struct usb_endpoint_descriptor *ep_out = NULL;
1135 u8 addr, attrs;
1136 int pipe, i;
1137 int retval = -ENOMEM;
1138
1139 rr3_ftr(dev, "%s called\n", __func__);
1140
1141 uhi = intf->cur_altsetting;
1142
1143 /* find our bulk-in and bulk-out endpoints */
1144 for (i = 0; i < uhi->desc.bNumEndpoints; ++i) {
1145 ep = &uhi->endpoint[i].desc;
1146 addr = ep->bEndpointAddress;
1147 attrs = ep->bmAttributes;
1148
1149 if ((ep_in == NULL) &&
1150 ((addr & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN) &&
1151 ((attrs & USB_ENDPOINT_XFERTYPE_MASK) ==
1152 USB_ENDPOINT_XFER_BULK)) {
1153 rr3_dbg(dev, "found bulk-in endpoint at 0x%02x\n",
1154 ep->bEndpointAddress);
1155 /* data comes in on 0x82, 0x81 is for other data... */
1156 if (ep->bEndpointAddress == RR3_BULK_IN_EP_ADDR)
1157 ep_in = ep;
1158 }
1159
1160 if ((ep_out == NULL) &&
1161 ((addr & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) &&
1162 ((attrs & USB_ENDPOINT_XFERTYPE_MASK) ==
1163 USB_ENDPOINT_XFER_BULK)) {
1164 rr3_dbg(dev, "found bulk-out endpoint at 0x%02x\n",
1165 ep->bEndpointAddress);
1166 ep_out = ep;
1167 }
1168 }
1169
1170 if (!ep_in || !ep_out) {
1171 dev_err(dev, "Couldn't find both in and out endpoints\n");
1172 retval = -ENODEV;
1173 goto no_endpoints;
1174 }
1175
1176 /* allocate memory for our device state and initialize it */
1177 rr3 = kzalloc(sizeof(*rr3), GFP_KERNEL);
1178 if (rr3 == NULL) {
1179 dev_err(dev, "Memory allocation failure\n");
1180 goto no_endpoints;
1181 }
1182
1183 rr3->dev = &intf->dev;
1184
1185 /* set up bulk-in endpoint */
1186 rr3->read_urb = usb_alloc_urb(0, GFP_KERNEL);
1187 if (!rr3->read_urb) {
1188 dev_err(dev, "Read urb allocation failure\n");
1189 goto error;
1190 }
1191
1192 rr3->ep_in = ep_in;
1193 rr3->bulk_in_buf = usb_alloc_coherent(udev, ep_in->wMaxPacketSize,
1194 GFP_ATOMIC, &rr3->dma_in);
1195 if (!rr3->bulk_in_buf) {
1196 dev_err(dev, "Read buffer allocation failure\n");
1197 goto error;
1198 }
1199
1200 pipe = usb_rcvbulkpipe(udev, ep_in->bEndpointAddress);
1201 usb_fill_bulk_urb(rr3->read_urb, udev, pipe,
1202 rr3->bulk_in_buf, ep_in->wMaxPacketSize,
1203 (usb_complete_t)redrat3_handle_async, rr3);
1204
1205 /* set up bulk-out endpoint*/
1206 rr3->write_urb = usb_alloc_urb(0, GFP_KERNEL);
1207 if (!rr3->write_urb) {
1208 dev_err(dev, "Write urb allocation failure\n");
1209 goto error;
1210 }
1211
1212 rr3->ep_out = ep_out;
1213 rr3->bulk_out_buf = usb_alloc_coherent(udev, ep_out->wMaxPacketSize,
1214 GFP_ATOMIC, &rr3->dma_out);
1215 if (!rr3->bulk_out_buf) {
1216 dev_err(dev, "Write buffer allocation failure\n");
1217 goto error;
1218 }
1219
1220 pipe = usb_sndbulkpipe(udev, ep_out->bEndpointAddress);
1221 usb_fill_bulk_urb(rr3->write_urb, udev, pipe,
1222 rr3->bulk_out_buf, ep_out->wMaxPacketSize,
1223 (usb_complete_t)redrat3_write_bulk_callback, rr3);
1224
1225 mutex_init(&rr3->lock);
1226 rr3->udev = udev;
1227
1228 redrat3_reset(rr3);
1229 redrat3_get_firmware_rev(rr3);
1230
1231 /* might be all we need to do? */
1232 retval = redrat3_enable_detector(rr3);
1233 if (retval < 0)
1234 goto error;
1235
1236 /* store current hardware timeout, in us, will use for kfifo resets */
1237 rr3->hw_timeout = redrat3_get_timeout(rr3);
1238
1239 /* default.. will get overridden by any sends with a freq defined */
1240 rr3->carrier = 38000;
1241
1242 rr3->rc = redrat3_init_rc_dev(rr3);
1243 if (!rr3->rc)
1244 goto error;
1245
1246 setup_timer(&rr3->rx_timeout, redrat3_rx_timeout, (unsigned long)rr3);
1247
1248 /* we can register the device now, as it is ready */
1249 usb_set_intfdata(intf, rr3);
1250
1251 rr3_ftr(dev, "Exiting %s\n", __func__);
1252 return 0;
1253
1254 error:
1255 redrat3_delete(rr3, rr3->udev);
1256
1257 no_endpoints:
1258 dev_err(dev, "%s: retval = %x", __func__, retval);
1259
1260 return retval;
1261 }
1262
1263 static void __devexit redrat3_dev_disconnect(struct usb_interface *intf)
1264 {
1265 struct usb_device *udev = interface_to_usbdev(intf);
1266 struct redrat3_dev *rr3 = usb_get_intfdata(intf);
1267
1268 rr3_ftr(&intf->dev, "Entering %s\n", __func__);
1269
1270 if (!rr3)
1271 return;
1272
1273 redrat3_disable_detector(rr3);
1274
1275 usb_set_intfdata(intf, NULL);
1276 rc_unregister_device(rr3->rc);
1277 del_timer_sync(&rr3->rx_timeout);
1278 redrat3_delete(rr3, udev);
1279
1280 rr3_ftr(&intf->dev, "RedRat3 IR Transceiver now disconnected\n");
1281 }
1282
1283 static int redrat3_dev_suspend(struct usb_interface *intf, pm_message_t message)
1284 {
1285 struct redrat3_dev *rr3 = usb_get_intfdata(intf);
1286 rr3_ftr(rr3->dev, "suspend\n");
1287 usb_kill_urb(rr3->read_urb);
1288 return 0;
1289 }
1290
1291 static int redrat3_dev_resume(struct usb_interface *intf)
1292 {
1293 struct redrat3_dev *rr3 = usb_get_intfdata(intf);
1294 rr3_ftr(rr3->dev, "resume\n");
1295 if (usb_submit_urb(rr3->read_urb, GFP_ATOMIC))
1296 return -EIO;
1297 return 0;
1298 }
1299
1300 static struct usb_driver redrat3_dev_driver = {
1301 .name = DRIVER_NAME,
1302 .probe = redrat3_dev_probe,
1303 .disconnect = redrat3_dev_disconnect,
1304 .suspend = redrat3_dev_suspend,
1305 .resume = redrat3_dev_resume,
1306 .reset_resume = redrat3_dev_resume,
1307 .id_table = redrat3_dev_table
1308 };
1309
1310 static int __init redrat3_dev_init(void)
1311 {
1312 int ret;
1313
1314 ret = usb_register(&redrat3_dev_driver);
1315 if (ret < 0)
1316 pr_err(DRIVER_NAME
1317 ": usb register failed, result = %d\n", ret);
1318
1319 return ret;
1320 }
1321
1322 static void __exit redrat3_dev_exit(void)
1323 {
1324 usb_deregister(&redrat3_dev_driver);
1325 }
1326
1327 module_init(redrat3_dev_init);
1328 module_exit(redrat3_dev_exit);
1329
1330 MODULE_DESCRIPTION(DRIVER_DESC);
1331 MODULE_AUTHOR(DRIVER_AUTHOR);
1332 MODULE_AUTHOR(DRIVER_AUTHOR2);
1333 MODULE_LICENSE("GPL");
1334 MODULE_DEVICE_TABLE(usb, redrat3_dev_table);
1335
1336 module_param(debug, int, S_IRUGO | S_IWUSR);
1337 MODULE_PARM_DESC(debug, "Enable module debug spew. 0 = no debugging (default) "
1338 "0x1 = standard debug messages, 0x2 = function tracing debug. "
1339 "Flag bits are addative (i.e., 0x3 for both debug types).");
linux-next